Sadly, I understand that "Hook" Boutin has passed. But there are still quite a few Vietnam era vets surviving, and I would encourage everyone to document as much of that history from "the horse's mouth" ASAP. We have already lost the WWII Generation, largely, and few Korean War vets are heard from.
Glad to hear that the XM-21 was a good piece from people who were there. That is it's reputation, but it's nicer to hear it from someone who waw it in action. CC
Colt, Glock and Remington factory trained LE Armorer
LE Trained Firearms Instructor